FINISH PARTS WITH A ZINC ELECTROPLATE WITH A SUPPLEMENTARYIRIDESCENT BLUE (BRIGHT BLUE-CLEAR) TRIVALENT CHROMIUMCONVERSION COATING. REFERENCE: ASTM B633 CLASSIFICATIONFe/Zn8. PART FINISH OR APPEARANCE (LUSTER) MAY BE SEMl-BRIGHT TO BRIGHT. FOLLOWING THE CONVERSION COATING,THE PARTS SHALL BE PROCESSED WITH A ANTI CORROSIONSILICATE TYPE SEALER.